1.4 TFSI engine jerks

unikarl

Registered User
Has anyone else who is unfortunate enough to own the 1.4 TFSI experienced any engine running issues?

my car seems to deliver its power in an almost jerky motion until I get the revs above 3000.
It’s almost like the power delivery is stepped rather than smooth and progressive.
I have no engine management light and no faults stored in the ecu either.
If I’m the only one with this issue does anyone know a decent garage that has good knowledge on these engines?

thanks in advance
 

abmat

Well-Known Member
VCDS Map User
DSG?

try running it on E5. Discussed a lot on the A3 forums.
 

unikarl

Registered User
It’s a manual.
I only run it on E5. Costs more but worth it. I did try regular E10 just once and the jerking was still there anyway.
 
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firebits

A4 Avant Sport 1.4 TFSI
I’m having similar issues. It’s been running better since using injector cleaner and getting serviced but it’s still not right. Not sure if there is an injector issue, carbon build up on the inlet valves/sensor/whatever. Fuel economy not great either. At 74,000 miles now
 

unikarl

Registered User
My fuel economy seems down too.
My cars only at 30,000 miles which made me wonder if it needs a good clean out.
I might see if I can get some boost logs too as I’m not sure if maybe the turbo is playing up.
I just hate having to guess so much!
 

unikarl

Registered User
I’ll buy it and give it a go.
Thanks for the advice.
 

unikarl

Registered User
Tried running the bg44k through it but no difference.
Does anyone know if these cars have a diverter valve. Seem to remember my old 1.8t years ago had one that started to fail which gave similar issues.
 

firebits

A4 Avant Sport 1.4 TFSI
I removed my MAP sensor and cleaned it with Contact Spray a few weeks ago. It wasn’t giving any codes and it probably wasn’t this however, it’s all running well now. Given its now winter and we are on E10 now, this is more likely what’s causing my 37MPG. When I had the stutter issue, I was only getting 31MPG.
Hope you get to the bottom of your issue.
 

unikarl

Registered User
I think this will be tomorrows job now!

just need to find the map sensor!
 

unikarl

Registered User
I’ve just found it. It doesn’t look right as it’s only clipped in but I guess that’s normal?
I bought a new one anyway and installed it so I’ll take it out later and see if there’s any difference.
Thanks for the advise
 
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